Fig 8. Differences in invasiveness and mortality between the PittII WT and Msf-KO strains in the chinchilla OMID model.

Two cohorts of chinchillas were inoculated bilaterally through the tympanic bulla with either PittII or PittII Msf-KO. (A) Mortality over time showing the number of animals still alive after each day; (B) Bacterial recovery percentages by tissue for WT and Msf-KO infected animals. Tissues were collected at the time of animal death. * p<0.05 by two-tailed Fisher-exact test.